getch in terminal

getch.py

import sys, tty, termios

def getch():
    fd = sys.stdin.fileno()
    old_settings = termios.tcgetattr(fd)
    try:
        tty.setraw(sys.stdin.fileno())
        ch = sys.stdin.read(1)
        if ch == '\x1b':
            ch += sys.stdin.read(2)
            # todo: remove magic number
    finally:
        termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
    return ch

while True:
    a = getch()
    print(repr(a))
    if a == "\x04":
        print("Quiting.....")
        break